2022 年 64 巻 209 号 p. 237-244
From the perspective of long-term stable energy supply, Bioenergy is the only renewable energy alternative fuel to coal coke in the steel industry. This presenting development aims to achieve a carbon-neutral society in short/medium strategy as the primary energy that can be the only means of the long-term stockpile to avoid resource depletion. The development of bioenergy as primary energy is an urgent issue. This report describes our efforts to develop solid biofuels from the perspective of coal depletion within 200 years and the development of combustion science to accomplish a carbon-neutral society in the steel field. Especially, stockpiling is necessary from the viewpoint of a stable energy supply in the future. This article will also describe how solid biofuels utilization based on the green casting concept.